diff --git a/dlls/d3dcompiler_43/hlsl.y b/dlls/d3dcompiler_43/hlsl.y
index 498ca4bb59d..59e0df9d8c0 100644
--- a/dlls/d3dcompiler_43/hlsl.y
+++ b/dlls/d3dcompiler_43/hlsl.y
@@ -1322,8 +1322,15 @@ func_declaration:         func_prototype compound_statement
                                 pop_scope(&hlsl_ctx);
                             }
 
+                        /* var_modifiers is necessary to avoid shift/reduce conflicts. */
 func_prototype:           var_modifiers type var_identifier '(' parameters ')' colon_attribute
                             {
+                                if ($1)
+                                {
+                                    hlsl_report_message(get_location(&@1), HLSL_LEVEL_ERROR,
+                                            "unexpected modifiers on a function");
+                                    YYABORT;
+                                }
                                 if (get_variable(hlsl_ctx.globals, $3))
                                 {
                                     hlsl_report_message(get_location(&@3),
diff --git a/dlls/d3dcompiler_43/tests/hlsl_d3d9.c b/dlls/d3dcompiler_43/tests/hlsl_d3d9.c
index b16f6e34548..3edee34d8de 100644
--- a/dlls/d3dcompiler_43/tests/hlsl_d3d9.c
+++ b/dlls/d3dcompiler_43/tests/hlsl_d3d9.c
@@ -925,6 +925,11 @@ static void test_fail(void)
         "    float a[(x = 2)];\n"
         "    return float4(0, 0, 0, 0);\n"
         "}",
+
+        "uniform float4 test() : SV_TARGET\n"
+        "{\n"
+        "    return float4(0, 0, 0, 0);\n"
+        "}",
     };
 
     static const char *targets[] = {"ps_2_0", "ps_3_0", "ps_4_0"};